CVE-2026-64277: Input: synaptics-rmi4 - bound the F3A keymap to the GPIO count
Noroxi assessment
Priority: Monitor (action score 31/100)
- The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
- Probability of exploitation in the next 30 days: 0.16% (FIRST EPSS).
- Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
- Fixed version: Linux Linux 3480e24bc4e178aaa009edb25b6ee12df199e210, 35ed74d32d8260bdfb14a94caf402bf0866bdeec, 502ad7caaa1a445b734c827fa256e5311df67e3d; azl3 kernel 6.6.144.1-1 on Azure Linux 3.0 6.6.145.2-1.
Low priority for now. Upgrade to Linux Linux 3480e24bc4e178aaa009edb25b6ee12df199e210, 35ed74d32d8260bdfb14a94caf402bf0866bdeec, 502ad7caaa1a445b734c827fa256e5311df67e3d; azl3 kernel 6.6.144.1-1 on Azure Linux 3.0 6.6.145.2-1 or later.
Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it
Primary sources: NVD · CVE.org · FIRST EPSS
In the Linux kernel, the following vulnerability has been resolved: Input: synaptics-rmi4 - bound the F3A keymap to the GPIO count rmi_f3a_initialize() takes the GPIO count from the device query register (f3a->gpio_count = buf & RMI_F3A_GPIO_COUNT, range 0..127). rmi_f3a_map_gpios() then allocates gpio_key_map with min(gpio_count, TRACKSTICK_RANGE_END) == at most 6 entries, but rmi_f3a_attention() iterates the full gpio_count and dereferences gpio_key_map[i], and input->keycodemax is set to the full gpio_count while input->keycode points at the 6-entry allocation. A device that reports gpio_count > 6 therefore causes an out-of-bounds read of gpio_key_map[] on every attention interrupt, and out-of-bounds accesses through the input core's default keymap ioctls: EVIOCGKEYCODE reads past the buffer (leaking adjacent slab memory to user space) and EVIOCSKEYCODE writes a caller-controlled value past it, for any process able to open the evdev node, since input_default_getkeycode() and input_default_setkeycode() only bound the index against keycodemax. Size the keymap for the full gpio_count. The mapping loop is unchanged: it still assigns only the first min(gpio_count, TRACKSTICK_RANGE_END) entries; the remaining slots stay KEY_RESERVED (devm_kcalloc zero-fills) and are skipped when reporting.
- Published
- Jul 25, 2026
- Updated
- Oct 24, 2026
- EPSS
- 0.1% · 6th percentile
- CWE
- CWE-125
Report tools
Action score
31
Monitor
Low priority for now.
- CVSS
- 31 / 40 · 7.8 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.1%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- —
- CNA · Linux
- 7.8
- NVD has not scored this yet; the score shown is the CNA’s.
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- No public exploit code on record
- A fix has been released
If any of these changes, we'll tell you in the daily email digest.
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Noroxi analysis
What does it mean in your environment?
The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.
We use this product, ask for helpAffected systems
Is your version affected?
Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.
| Vendor | Product | CPE |
|---|---|---|
| linux | linux kernel | cpe:2.3:o:linux:linux_kernel |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- linux linux kernel5.10 and later · before 5.10.261
- linux linux kernel5.11 and later · before 5.15.212
- linux linux kernel5.16 and later · before 6.1.178
- linux linux kernel6.2 and later · before 6.6.145
- linux linux kernel6.7 and later · before 6.12.96
- linux linux kernel6.13 and later · before 6.18.39
- linux linux kernel6.19 and later · before 7.1.4
Versions reported by the vendor
Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.
Linux Linux
- 5.10affected
- 9e4c596bfd004f447a652205163234dfd4aafa69 and later · before 502ad7caaa1a445b734c827fa256e5311df67e3daffected · git
- 9e4c596bfd004f447a652205163234dfd4aafa69 and later · before 3480e24bc4e178aaa009edb25b6ee12df199e210affected · git
- 9e4c596bfd004f447a652205163234dfd4aafa69 and later · before 35ed74d32d8260bdfb14a94caf402bf0866bdeecaffected · git
- 9e4c596bfd004f447a652205163234dfd4aafa69 and later · before ba57f430328534501962d60d651e385ffd7af9caaffected · git
- 9e4c596bfd004f447a652205163234dfd4aafa69 and later · before 850117b637bcb1dcc14be0cf09ac819a8707b42caffected · git
- 9e4c596bfd004f447a652205163234dfd4aafa69 and later · before 8db211aed83733073b0814adaeeab61d4521474eaffected · git
- 9e4c596bfd004f447a652205163234dfd4aafa69 and later · before 64fb0e1161ccc6b9e48b8df61f07d3c34c01ec42affected · git
- 9e4c596bfd004f447a652205163234dfd4aafa69 and later · before 57c10915f2c16c90e0d46ad00876bf39ece40fc2affected · git
- before 5.10not affected · semver
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| AlmaLinux:8 | bpftool | before 4.18.0-553.158.1.el8_10 | 4.18.0-553.158.1.el8_10 |
| AlmaLinux:8 | kernel | before 4.18.0-553.158.1.el8_10 | 4.18.0-553.158.1.el8_10 |
| AlmaLinux:8 | kernel-abi-stablelists | before 4.18.0-553.158.1.el8_10 | 4.18.0-553.158.1.el8_10 |
| AlmaLinux:8 | kernel-core | before 4.18.0-553.158.1.el8_10 | 4.18.0-553.158.1.el8_10 |
| AlmaLinux:8 | kernel-cross-headers | before 4.18.0-553.158.1.el8_10 | 4.18.0-553.158.1.el8_10 |
| AlmaLinux:8 | kernel-debug | before 4.18.0-553.158.1.el8_10 | 4.18.0-553.158.1.el8_10 |
| AlmaLinux:8 | kernel-debug-core | before 4.18.0-553.158.1.el8_10 | 4.18.0-553.158.1.el8_10 |
| AlmaLinux:8 | kernel-debug-devel | before 4.18.0-553.158.1.el8_10 | 4.18.0-553.158.1.el8_10 |
| AlmaLinux:8 | kernel-debug-modules | before 4.18.0-553.158.1.el8_10 | 4.18.0-553.158.1.el8_10 |
| AlmaLinux:8 | kernel-debug-modules-extra | before 4.18.0-553.158.1.el8_10 | 4.18.0-553.158.1.el8_10 |
| AlmaLinux:8 | kernel-devel | before 4.18.0-553.158.1.el8_10 | 4.18.0-553.158.1.el8_10 |
| AlmaLinux:8 | kernel-doc | before 4.18.0-553.158.1.el8_10 | 4.18.0-553.158.1.el8_10 |
| AlmaLinux:8 | kernel-headers | before 4.18.0-553.158.1.el8_10 | 4.18.0-553.158.1.el8_10 |
| AlmaLinux:8 | kernel-modules | before 4.18.0-553.158.1.el8_10 | 4.18.0-553.158.1.el8_10 |
| AlmaLinux:8 | kernel-modules-extra | before 4.18.0-553.158.1.el8_10 | 4.18.0-553.158.1.el8_10 |
| AlmaLinux:8 | kernel-rt | before 4.18.0-553.158.1.rt7.499.el8_10 | 4.18.0-553.158.1.rt7.499.el8_10 |
| AlmaLinux:8 | kernel-rt-core | before 4.18.0-553.158.1.rt7.499.el8_10 | 4.18.0-553.158.1.rt7.499.el8_10 |
| AlmaLinux:8 | kernel-rt-debug | before 4.18.0-553.158.1.rt7.499.el8_10 | 4.18.0-553.158.1.rt7.499.el8_10 |
| AlmaLinux:8 | kernel-rt-debug-core | before 4.18.0-553.158.1.rt7.499.el8_10 | 4.18.0-553.158.1.rt7.499.el8_10 |
| AlmaLinux:8 | kernel-rt-debug-devel | before 4.18.0-553.158.1.rt7.499.el8_10 | 4.18.0-553.158.1.rt7.499.el8_10 |
| AlmaLinux:8 | kernel-rt-debug-modules | before 4.18.0-553.158.1.rt7.499.el8_10 | 4.18.0-553.158.1.rt7.499.el8_10 |
| AlmaLinux:8 | kernel-rt-debug-modules-extra | before 4.18.0-553.158.1.rt7.499.el8_10 | 4.18.0-553.158.1.rt7.499.el8_10 |
| AlmaLinux:8 | kernel-rt-devel | before 4.18.0-553.158.1.rt7.499.el8_10 | 4.18.0-553.158.1.rt7.499.el8_10 |
| AlmaLinux:8 | kernel-rt-modules | before 4.18.0-553.158.1.rt7.499.el8_10 | 4.18.0-553.158.1.rt7.499.el8_10 |
+96
Same product
linux: all recordsOther highest-scoring records for the same primary product.
- CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV90Now
- CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV89Now
- CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV85Now
Published before and after this one in the same product
- ← EarlierCVE-2026-64275Jul 25, 2026 · Input: elan_i2c - prevent division by zero and arithmetic underflow22Monitor
- ← EarlierCVE-2026-64276Jul 25, 2026 · Input: synaptics-rmi4 - bound the F30 keymap to the GPIO/LED count31Monitor
- Later →CVE-2026-64279Jul 25, 2026 · i2c: core: fix adapter deregistration race31Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| Linux Linux | 3480e24bc4e178aaa009edb25b6ee12df199e210 | Vendor (CNA) |
| Linux Linux | 35ed74d32d8260bdfb14a94caf402bf0866bdeec | Vendor (CNA) |
| Linux Linux | 502ad7caaa1a445b734c827fa256e5311df67e3d | Vendor (CNA) |
| Linux Linux | 57c10915f2c16c90e0d46ad00876bf39ece40fc2 | Vendor (CNA) |
| Linux Linux | 64fb0e1161ccc6b9e48b8df61f07d3c34c01ec42 | Vendor (CNA) |
| Linux Linux | 850117b637bcb1dcc14be0cf09ac819a8707b42c | Vendor (CNA) |
| Linux Linux | 8db211aed83733073b0814adaeeab61d4521474e | Vendor (CNA) |
| Linux Linux | ba57f430328534501962d60d651e385ffd7af9ca | Vendor (CNA) |
| azl3 kernel 6.6.144.1-1 on Azure Linux 3.0 | 6.6.145.2-1 · CBL-Mariner Releases | Microsoft (MSRC) |
| almalinux:kernel | 5.14.0-687.42.1.el9_8 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-64k | 5.14.0-687.42.1.el9_8 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-64k-core | 5.14.0-687.42.1.el9_8 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-64k-debug | 5.14.0-687.42.1.el9_8 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-64k-debug-core | 5.14.0-687.42.1.el9_8 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-64k-debug-devel | 5.14.0-687.42.1.el9_8 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-64k-debug-devel-matched | 5.14.0-687.42.1.el9_8 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-64k-debug-modules | 5.14.0-687.42.1.el9_8 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-64k-debug-modules-core | 5.14.0-687.42.1.el9_8 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-64k-debug-modules-extra | 5.14.0-687.42.1.el9_8 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-64k-devel | 5.14.0-687.42.1.el9_8 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-64k-devel-matched | 5.14.0-687.42.1.el9_8 · AlmaLinux:9 | Package registry (OSV) |
| debian:linux | 6.1.180-1 · Debian:12 | Package registry (OSV) |
| debian:linux-6.12 | 6.12.100-1~deb12u1 · Debian:12 | Package registry (OSV) |
| red hat:kernel-64k-debug-debuginfo | 0:5.14.0-687.42.1.el9_8 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:kernel-64k-debug-devel | 0:5.14.0-687.42.1.el9_8 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:kernel-64k-debug-devel-matched | 0:5.14.0-687.42.1.el9_8 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:kernel-64k-debuginfo | 0:5.14.0-687.42.1.el9_8 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:kernel-64k-devel | 0:5.14.0-687.42.1.el9_8 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:kernel-64k-devel-matched | 0:5.14.0-687.42.1.el9_8 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:kernel-debug-debuginfo | 0:5.14.0-687.42.1.el9_8 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
+7
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Someone with local access to the system can trigger it.
- A low-privileged account is enough.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
- Attack vector
- Local
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
CWE-125 · Out-of-bounds ReadCVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
nvd-secondary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
ATT&CK techniques
—
Change log
- SSVC exploitation— → none
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (7 more)Show less
- git.kernel.org/stable/c/35ed74d32d8260bdfb14a94caf402bf0866bdeec
- git.kernel.org/stable/c/502ad7caaa1a445b734c827fa256e5311df67e3d
- git.kernel.org/stable/c/57c10915f2c16c90e0d46ad00876bf39ece40fc2
- git.kernel.org/stable/c/64fb0e1161ccc6b9e48b8df61f07d3c34c01ec42
- git.kernel.org/stable/c/850117b637bcb1dcc14be0cf09ac819a8707b42c
- git.kernel.org/stable/c/8db211aed83733073b0814adaeeab61d4521474e
- git.kernel.org/stable/c/ba57f430328534501962d60d651e385ffd7af9ca
Vendor advisories and official records. Exploit/PoC links are deliberately left out.